采用高效升压转换器的音箱/便携式扬声器参考设计

`描述

PMP9491 is a 30W highly efficient and compact Portable Speaker/Audio Boom Box reference Design which can be used in 15W +15W Stereo or 30W Woofer Applications. The Power Source for the Design is 1 or 2 Li ion in Series . The design is broadly divided into three main stages:

Highly efficient Single-Phase Non Synchronous Boost Converter using the LM3481 controller IC. The design accepts an input voltage of 3.3Vin to 9Vin and provides an output of 12 V capable of supplying 2.5A of continuous current to the load. The peak efficency acheived is 95 percent .
15W+15W Stereo Audio Amplifier with TPA3118D2 Class D device.
Very Low Cost Stereo Inputs to Woofer Bass Input Conversion.
Battery Charger bq24133 , 2.5A Synchronous Switch-Mode Li-Ion/Li-Polymer Stand-Alone Battery Charger with Integrated MOSFETs and Power Path Selector.

特性

Low Cost Non Synchronous Boost for Audio Boom Box application.
Ultra Low Footprint Area for LM3481 Actual Power Stage
Single Speaker (Woofer), Dual Speaker(Stereo) Support in the design
Low Vin Support for Single as well as Dual Li ion Battery support
100-kHz to 1-MHz Adjustable / Synchronizable Clock Frequency and limits the inrush current at start-up.
Battery Charger with Dynamic Power Path management

PMP9491 Schematic.pdf (148.78 KB)
(下载次数: 3, 2015-3-10 14:45 上传)

tidc928.zip (322.75 KB)
(下载次数: 4, 2015-3-10 14:45 上传)

PMP9491 Test Results.pdf (4.58 MB)
(下载次数: 2, 2015-3-10 14:46 上传)

PMP9491 BOM.pdf (24.61 KB)
(下载次数: 3, 2015-3-10 14:45 上传)

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采用高效升压转换器的音箱/便携式扬声器参考设计

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